The Mafu Cage (1978)

Overview: Two strange sisters live in a crumbling mansion, where they keep a pet ape, which belonged to their late father, locked in a cage. While one of the sisters seems to be keeping her head on straight, as it were, the other appears to be sinking further and further into barbarism and insanity.

Starring: Lee Grant, Carol Kane, Will Geer, James Olson

Categories: Thriller, Horror